Birds that are egg-bound display the following symptoms: may or may not have passed an egg within the last 48 hours; are usually weak, not perching, often sitting low on the perch or on the bottom of the cage; are usually straining as if trying to defecate or lay an egg; usually have a noticeable swelling of the abdomen.

Egg binding occurs when a female bird can't pass an egg and the egg is retained within the bird's body.[10] Egg binding is considered a serious and potentially life-threatening condition in birds if not promptly treated.[10]

Egg binding is a serious condition that can occur in female birds when an egg gets stuck in the oviduct and she is unable to pass it.[11] When eggs pass through the vent, the passage to the intestines is blocked off to prevent contamination so quick action must be taken if a bird is egg bound as they can die within 24-48 hours if she can’t defecate.[11] Symptoms include watery feces or no feces at all along with a full crop and going in and out of a nesting box repeatedly without laying.[11]

The MSD Veterinary Manual section on reproductive diseases of pet birds notes: "Clinical signs of egg binding include a bird on the bottom of the cage, depression, closed eyes, bobbing tail, and dyspnea." Though it does not explicitly mention feces, it characterises egg binding as a serious condition with systemic signs and respiratory distress, which can deteriorate quickly and may be life‑threatening if not treated promptly.

Clinical signs associated with egg binding and dystocia vary according to severity, size of the bird, and the degree of secondary complications. Common signs include acute depression and anorexia. Abdominal straining, distention, and cloacal prolapse may be present. Respiratory difficulty may be manifested as open-mouth breathing or tail-bobbing. Failure to perch, lameness, weakness, or paralysis may occur. Sudden death is possible. Dystocia can interfere with normal defecation and micturition, resulting in ileus and renal dysfunction. Metabolic disturbances and pain may lead to anorexia, dehydration, and further deterioration.

Egg-binding occurs when a female bird is unable to expel an egg from the reproductive tract.[15] Birds that have this problem might exhibit depression, labored breathing, straining, abdominal distention, lack of droppings, whitish droppings only, fluffed appearance, and poor appetite.[15]

PetMD’s overview of egg binding in birds lists common clinical signs as: "Anorexia... Abdominal straining... Abdominal distension... Cloacal prolapse... Wide stance... Tail wagging or bobbing... Open-mouth breathing... Failure to perch... Lameness or weakness... Paralysis... Sudden death." While fecal passage is not detailed, the presence of abdominal straining, cloacal prolapse, and sudden death underscores that the condition can worsen rapidly without intervention.

Egg binding is an emergency situation as quite often the bird is in shock, respiratory distress or circulatory collapse. Signs include weakness, labored breathing, depression and inability to walk or perch in some cases. Abdominal enlargement is typically a characteristic sign, usually with a palpable egg present in the abdomen.

Clinical signs vary according to severity and secondary complications. Common signs include depression, abdominal straining and distention, persistent tail wagging, a wide stance, failure to perch, dyspnea, and/or sudden death. An egg lodged in the pelvic canal may compress the pelvic blood vessels, kidneys, pelvic plexus, and other local nerves. This can cause circulatory shock, lameness, and paresis.

PoultryDVM’s article on egg binding in chickens notes among common clinical signs: "Abdominal straining without producing an egg" and "Decreased or absent feces and urates" and later specifies "Scant to absent feces and urates" as a sign.[16] This indicates that in egg binding, failure to lay an egg can be accompanied by decreased or absent fecal output, suggesting simultaneous reproductive and excretory obstruction in birds.

Egg binding is a common egg-laying associated problem which occurs in female ducks.[1] It is defined as the failure of an egg to pass through the oviduct within a normal period of time.[1] Clinical signs include swollen abdomen, lethargy, constipation (presented as the bird trying to defecate but cannot), fluffed feathers, and lack of egg production.[1]

A MedCrave article on avian and wildlife biology describing clinical signs of egg binding in birds reports: "Recorded signs are wagging of the tail, frequent straining, distension of the abdomen, imbalance on perch, lameness, difficulty in passing of droppings, reduction in the width and consistency of droppings..."[6] This explicitly links egg binding with "difficulty in passing droppings" and altered feces, indicating that inability or difficulty in defecation can occur with the egg‑bound state.

Signs often appear suddenly and may include: tail bobbing and excessive straining; wide stance, drooping wings, sitting at cage bottom; fluffed feathers, lethargy, anorexia, open-mouth breathing; abdominal swelling, cloacal prolapse, bleeding drops; leg weakness or paralysis if nerves are compressed; sudden death if untreated (<48 h).

Egg binding, or dystocia, is a common problem in domestic ducks.[4] It occurs when a duck cannot pass an egg that has been formed, either due to a physical obstruction or a lack of muscle tone in the reproductive tract.[4] Signs may include inability to pass feces.[4] The egg could block feces from getting released. Your duck can die within 24 hours if this happens, so check to see if your duck still poops.[4] One problem is that the egg blocks the feces from being released. This can be very serious and even fatal for the duck if not treated.[4]

The Clinician’s Brief article on egg binding in pet birds states: "Common signs include depression, abdominal straining and distention, persistent tail wagging, a wide stance, failure to perch, dyspnea, and/or sudden death."[9] It further notes that dystocia "can interfere with normal defecation and micturition, resulting in ileus and renal dysfunction."[15] This supports that egg binding (dystocia) can physically interfere with defecation and that the condition may progress quickly to severe systemic complications, including sudden death.

The presence of an egg in the coelom has a space occupying mass effect, affecting the bird’s cardiorespiratory function and can result in death from hypoxia and decreased venous return. Signs of dystocia include excessive, unproductive straining, coelomic distension, dyspnoea, weakness and collapse. A form of paresis may develop, where pressure on the intra-pelvic canal nerves causes paresis or paralysis of the legs.

Symptoms of egg binding may include distended abdomen, weakness/lethargy, difficulty in standing or walking, tail wagging or bobbing, labored breathing, straining to pass the egg, and/or inability to pass feces.[12] In severe cases, the egg may compress the intestines, leading to reduced or absent fecal output and rapid deterioration of the bird's condition if untreated.[12]

SpectrumCare’s guide on duck egg binding summarises emergency signs and notes that Merck describes egg‑bound birds as "depressed, on the bottom of the enclosure, and sometimes dyspneic," and that VCA reports birds with egg‑binding symptoms "can decline fast enough to need urgent intervention."[2] It emphasizes that repeated straining, difficulty standing, fluffed and weak posture, and prolapse warrant immediate veterinary attention, indicating the potential for rapid clinical deterioration in egg‑bound ducks.

Their owners reported the following clinical signs at home: straining, loss of appetite, weakness, fluffed feathers, difficulty breathing, distended abdomen, and large, wet droppings.

Egg-bound birds can present a variety of clinical signs, with most owners noticing their female bird straining to pass an egg.[16] Some owners may mistake this as the bird straining to defecate, as often the hen is producing small to no droppings.[16] This reduction in droppings can occur concurrently with the inability to lay the egg, reflecting obstruction at the cloaca.[16]

AvianVets.org explains egg binding in chickens and ducks and lists "Abnormal droppings" and "failing to produce any at all" as a red flag, along with straining to pass an egg without success.[14] The text advises that failure to produce droppings or abnormal droppings, combined with other signs like labored breathing and swelling, are key indicators of egg binding, implying that impaired feces passage can occur alongside inability to lay the egg.

Egg bound birds will commonly present with lethargy, depression, anorexia, an abnormal stance, paresis of pelvic limbs, in advanced cases paralysis or even fracture of pelvic limbs, coelomic cavity swelling, varying degrees of respiratory distress, and cloacal prolapse.

These birds often present with a tight swollen belly or upright penguin stance however other symptoms include: listlessness; trouble walking; breathing issues/panting; staying in or frequent non productive visits to the nesting box; anorexia +/- crop stasis; straining +/- prolapsed cloaca; and soiling of the back area with faecal material.

A duck who is egg-bound has an egg stuck in her oviduct.[14] Egg-binding can lead to cloacal prolapse, a potentially fatal condition.[14] If, over the course of the next 24 hours, the duck has not passed an egg or if she becomes progressively painful, she should be examined by a veterinarian. Please note that other reproductive issues may cause similar signs to those seen with egg binding.[14]

The egg lodged in the duck’s reproductive tract can create a physical blockage.[5] This blockage can press against the intestines, preventing normal fecal matter from passing through.[5] When a duck cannot poop, waste products build up inside her body. This can lead to toxin accumulation, which can poison her system. Any interruption in this process can quickly become life-threatening.[5]

Feathered Farm Life’s overview of egg binding in ducks notes that changes in droppings are a warning sign: "You may notice that your duck is producing small, hard, or irregularly shaped droppings, which could indicate a blockage in the digestive tract. In some cases, you might see a complete absence of droppings..."[7] It also describes abdominal distension and straining to lay as common symptoms, suggesting that egg binding can affect both egg passage and fecal output and may present with absence of droppings in some cases.

Look for straining, lethargy, or a visibly swollen rear end. One of the first things you might notice is your bird straining as if she’s trying really hard to lay an egg, but nothing’s happening. If she’s droppings are smaller than usual or completely absent for a day or two, that’s another clue.

Egg-binding is the failure of an egg to pass through the oviduct over a normal period of time. There are many signs that a bird may be egg bound including depression, inability to perch, pain, straining, coelomic distension, respiratory distress, anorexia, lameness and paresis (weakness).

Egg-binding is a condition that happens in ducks and other poultry wherein an egg gets stuck in the reproductive tract.[13] This can cause other eggs to back up. In severe cases, the eggs can rupture inside the duck causing infection and death.[13] The authors note cases where treatment (warm bath, anti-inflammatory) allowed a duck to relax enough to pass the eggs, emphasizing that the condition can worsen quickly if eggs remain stuck.[13]

In true egg binding, the fecal matter can't pass the hard egg shell which is part of what leads to a quick death in those situations.[8] The commenter describes instances of ducks acting egg-bound with cracking sounds in their abdomen, and notes that both ducks passed away shortly after, suggesting rapid deterioration when feces cannot pass.[8]

A YouTube video titled "Symptoms of Egg Bound Duck" includes a description from the keeper that because "there was an egg stuck she wasn't able to shoot the poop out like she normally would be able to and so it was dribbling down her body," with associated wet feathers under the cloaca.[12] This anecdotal account illustrates impaired normal defecation occurring concurrently with a stuck egg in a duck, consistent with clinical descriptions of cloacal obstruction.

If a duck is unable to pass feces due to an egg blocking the cloaca (the same opening for excretion), then if they are able to poop, that's a positive sign that they are likely not egg-bound.[2] This comment explains that in egg binding, the egg at the cloaca can obstruct fecal passage, implying simultaneous difficulty laying an egg and defecating when the obstruction is severe.[2]